The energy released when 6 moles of octane is burnt in air will be [Given, ∆Hf for CO2(g), H2O(g) and C8H8(l), respectively are −490, −240 and +160 J/mol]

• A. −37.4 kJ
• B. −20 kJ
• C. −6.2 kJ
• D. −35.5 kJ